Pants Rebus #301

If you're new to Rebuses, you can read how to solve a Rebus here (link opens in a new window).

Do you need a little help? Click to reveal a clue to the above Rebus.
Here is clue to help decipher the hidden meaning. To not be able to keep still because you are very excited or worried about something.
Do you think you have got it? Click to view the answer.
The word “Pants” has ants within it, to give the answer: Ants In The Pants